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US4309830A - Apparatus for threading a float web dryer - Google Patents

Apparatus for threading a float web dryer Download PDF

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Publication number
US4309830A
US4309830A US06/131,403 US13140380A US4309830A US 4309830 A US4309830 A US 4309830A US 13140380 A US13140380 A US 13140380A US 4309830 A US4309830 A US 4309830A
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US
United States
Prior art keywords
web
bar
dryer
needles
chains
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/131,403
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English (en)
Inventor
Hilmar Vits
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vits Maschinenbau GmbH
Original Assignee
Vits Maschinenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vits Maschinenbau GmbH filed Critical Vits Maschinenbau GmbH
Application granted granted Critical
Publication of US4309830A publication Critical patent/US4309830A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/20—Advancing webs by web-penetrating means, e.g. pins
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/52—Auxiliary process performed during handling process for starting
    • B65H2301/522—Threading web into machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2183—Product mover including gripper means
    • Y10T83/219—Rotating or oscillating product handler

Definitions

  • a float web dryer conventionally comprises an enclosure having an entrance and exit and through which a traveling web to be dried is transported while supported or floated via upwardly ejected air jets which support the web free from mechanical contact while traveling through the dryer.
  • the enclosure may be formed by upper and lower chambers which can be opened from each other if this is required to thread the start of the web through the dryer. Threading may require not only opening of the two chambers, but a reduction in the air jet force, and usually the use of highly trained operators.
  • such a dryer can be provided with a threading device in the form of chains which can be used by the operators to engage one edge portion of the paper web so as to carry the start of the web through the dryer to a driven pulling drum about which the web is then wrapped to pull the web through the dryer.
  • the web may be composed of relatively loose fibers so that the web is unable to resist substantial tensioning or pulling forces when applied locally to the web.
  • An example of such a web is one that is in the form of a matting of fibers such as fiberglass matting. In such cases the web can be torn apart by treatment which might be satisfactory when threading a float dryer with a paper web.
  • One solution is to provide the float dryer with a transport screen which carries at least the starting end of the fibrous web through the float dryer.
  • loose fibrous material forming a matted web is usually impregnated with an adhesive treatment substance applied in a more or less liquid phase and which is why the web requires drying.
  • Such a substance sticks to a transport screen and ultimately requires the screen to be cleaned in one way or another and involving substantial servicing expense.
  • the object of the present invention is to provide an apparatus for threading such a fibrous material web through a float dryer without requiring opening of the dryer's chambers, the use of expert operating personnel or expensive servicing of the apparatus.
  • the above object is achieved by providing the float dryer with two transversely interspaced chains or their equivalent which run through the dryer's entrance to and from its exit and as endless loops running back to the entrance.
  • These chains carry at least one transverse bar provided with needles pointing at least at a slight angularity in the traveling direction of the chains, the bar being mounted transversely by and between the chains.
  • the chains form a transport means for the bar. With this arrangement the chains travel throughout the length of the dryer from its entrance to its exit end. Therefore, by fixing the starting or front end of the web to the needles this end can be carried through the dryer for threading of the web through the dryer.
  • the needles pick up the front end of the web which is easily penetrable because fibrous in nature, and carry the end of the web through the dryer to the pulling drum at the exit end of the dryer, and which continuously pulls the web thereafter through the dryer.
  • Fibrous material such as fiberglass mat
  • the present invention provides for a cutting blade carried by the chain-carried bar in front of the needles, and which severs the web after the web has been produced with its full intended or design width, the severed portion being discarded as scrap.
  • the needles behind the blade pick up the thus squared-off end of the web and carry it through the dryer to the pulling drum which then continues to pull the web through the dryer with the air jets, possibly heated, supporting the web throughout its extent against sagging in the dryer.
  • the pulling drum delivers the dried web to a winding device which may be of the type having winding drums mounted by arms which rotate about a fixed axis so that when one winding drum winds to its design capacity the other drum can be rotated to a position receiving the next supply of web.
  • a winding device which may be of the type having winding drums mounted by arms which rotate about a fixed axis so that when one winding drum winds to its design capacity the other drum can be rotated to a position receiving the next supply of web.
  • the chains carrying the bar with its needles and blade through the dryer the chains are designed as endless chains which from the exit end of the dryer return to the dryer's entrance end, and this winding device must necessarily be located within the chain loops at the exit end of the dryer.
  • the winding device can be provided with wheels on which the chains loop about the outside of the winding device and return to the entrance end of the dryer.
  • the cut-off blade is preferably of the serrated type with its peak aligned with the needles which are in turn mutually aligned in rows in their direction of travel.
  • a web counter roll is provided at the dryer's entrance end; and to provide clearance for the needles and the blade peaks, this counter roll is formed with grooves dimensioned and oriented for this purpose.
  • the needles function as a means on the transport bar for engaging the web when the web and bar are guided together with the needles penetrating the web at the dryer's entrance end, for continuously engaging the web during travel through the dryer, and releasing the web beyond the dryer's exit end by guiding the chains and web apart from each other so the web is pulled from the needles.
  • FIG. 1 is a vertical section showing the front or feeding end of the new threader at the entrance end of the dryer;
  • FIG. 2 is an enlarged scale view of the feeder details and is taken from FIG. 1;
  • FIG. 3 is a front view of a further enlarged scale and showing the arrangement of the needles and cutter blade previously referred to briefly;
  • FIG. 4 on an enlarged scale in cross section shows how the counter roll is grooved to provide clearance for the serrated cutting blade and the needles;
  • FIG. 5 in vertical section shows how at the exit end of the dryer the necessary mat-winding device permits the chains to reversely loop back to the dryer's entrance end;
  • FIG. 6 is a plan view of FIG. 5 looking down in the direction indicated by the arrow C in FIG. 5.
  • the web 1 can be made of an uncompacted and unwoven fibrous material, as might be exemplified by fiberglass matting. Its use requires impregnation with a material which can be considered as being glue-like or a wet adhesive, effected by the rolls 2 and 3. Assuming that the web 1 has left its manufacturing phase with an advancing or starting end having a width less than the design width of the web, this advancing end runs under the rollers 4 and 5 and upwardly over a power driven drum 6, this end having a width less than designed running downwardly into a collection pan 7.
  • the rollers and drum 4, 5 and 6 can be out in the open and exposed so that the advancing end of the web can be easily fed around them manually without complications or skill, with the waste or narrow part running down into the collection pan 7.
  • Sprocket chains 8 which can be interspaced slightly more than the design width of the web, run to the left in FIG. 1 at the bottom below the base level 9 of the dryer and under a pan 10 which can collect possible drippings from the web, and around sprocket wheels 11 and upwardly over sprocket wheels 12 rotating free from the drum 6 but about its axis, and then forwardly through the dryer entrance marked DE in FIG. 1.
  • the drum 6 is driven in a direction towards the dryer by a power unit, indicated at 6a, and although not illustrated, the sprocket wheels 11 can be driven by and in synchronism with the drum 6 via a clutch which when disengaged permits the sprocket wheels 11 and chains to remain stationary while the drum 6 continues to be rotatively driven.
  • the sprocket chains 8 carry the cross bar for the needles and cutter blades previously referred to, from the normal starting station 13 upwardly, as explained hereinafter.
  • This bar is part of an assembly 14 which comprises the cross bar 16 of hollow box-shaped cross section and having on the web's side a mounting 17 fixed to the bar in a preferably releaseable manner and mounting the needles 18 and the cutter blade 19 which are all forwardly angled relative to the chain's traveling direction.
  • the connection with the sprocket chains may be via cross rods 20 and 21 forming part of the chain link connections and connected with the bar 16 via brackets 22 and 23.
  • the bar 16 When the bar 16, with its cutter blade and needles, is carried upwardly by the chains 8, it encounters the web 1 tangentially with respect to the web, this actuation being only after the web has reached its full intended width, the timing being normally under control of the operator.
  • the web As the assembly 14 approaches the sprockets 12 and web tangentially, the web is provided with a counter pressure for the cutter blade and needles via a counter-pressure roll 15 having a periphery 24 formed by an elastically deformable material, such as rubber or synthetic rubber; and which as shown in FIG. 4, is provided with circumferential grooves providing clearance for the needles and the counter-bar serration peaks, keeping in mind that these are all aligned in the direction of travel of these parts.
  • the advancing end of the web 1 carried along by the chains 8 via the bar 16 and its needles is pulled around the pulling drums 26, 27 and 28, one or more of which are rotatively powered, with the web then being pulled to and over one of the winding drums of a winder 29.
  • This winder has a base rotatively mounting, via a horizontal axis, arms 30 journaling web winding drums 31 and 32 which are rotatively powered as usual, and via right angular arms, undriven rotative drums 33 and 34 about which the web can travel is desired.
  • This winder 29 can be designed so that when, as shown in FIG. 5, the drum 31 is positioned as shown, by looping around the winder as later explained, the chains and cross bar with its needles carry the mat over the drum 31 and possibly even the drum 33.
  • a severing and tacking device 36 severs the web end and tacks it onto that one of the rotatively driven winding drums.
  • This device can be operated by a hydraulic or pneumatic actuator 37 which swings levers 38 between operative and inoperative positions. In their operative position a pressure cylinder 39 can tack the advancing mat to the drum 31, the device including a rotative cutter 40 which then severs the preceding part of the web from the part tacked to the drum 31, the cutter 40 being carried by a pivotal arm 41 actuated at the appropriate time by a fluid pressure cylinder actuator 42.
  • the cut advancing end of the web may be of substantial length, as is indicated by FIG. 5, but in any event, it is carried by the needles and cutter bar via the chains back to the starting location 13 shown in FIG. 1, where it can be removed. The length of the advancing end of the mat which is cut off is operational.
  • the relative orientation and interspacing of the sprocket wheels 46 through 49 can be such that as the coiler assembly rotates, the effective lengths of the chains 8 do not change substantially, with the understanding that these chains may include the usual chain-length adjusting links, considering the possible length changes due to thermal expansion and contraction of the chains.
  • the web is manually fed between the impregnating or coating rolls 2 and 3, under the rolls 4 and 5 and to and over the driven drum 6.
  • the pressure roller or drum 15 can be swung aside as indicated by broken lines in FIG. 1. With the traveling web end over the drum 6, which is power driven, the narrow or waste end of the web feeds down into the pan 7. When the full width of web arrives, the counter-pressure roller 15 is positioned as shown in FIG. 1.
  • the chain driving sprocket wheels 11 can then be driven via a conventional connection with the drum 6 if an interposed clutch is provided; and if this design is used, the clutch is engaged so that the chains, with their cross bar and its needles and cutting bar assembly 14 at the starting station 13 now advance as indicated by FIG. 1.
  • the cutting blade 19 squarely severs the now full width web while the needles 18 penetrate the web and carry the square-cut end of the web up over the drum 6 and through the dryer in a positive manner without manual expertise or opening of the dryer enclosure.
  • Full air jet pressure can be used to fully support the feeding web in the dryer. No localized stress is applied to the web.
  • the web is pulled by and around the powered pulling drums 26 and 27 and 28.
  • the chains and assembly 14 then carry the web upwardly towards the drum 33 in the case of the FIG. 5 illustration.
  • Actuation of the cutting device 36 cuts the leading end while tacking its cut end, in this case, to the winding drum 31.
  • the web need not be carried as far beyond the drum 31 as is illustrated by FIG. 5, but the length remaining after the cut-off by the device 36 is, of course, carried along and reversely back to the station 13, shown by FIG. 1, where the cut-off length can be removed.
  • the power for driving the chain is derived from the sprocket wheels 11, the sprocket wheels shown at 43, 44, 45 and 46 through 49 being freely rotative sprocket wheels for guiding the chains which loop around the winder 29 for return of the chains to the entrance end of the dryer.
  • the motion of the device 36 pushes the web from the needles of the assembly 14 with the roller 39 pressing the web against one or another of the winding drums 31 and 32 for the winding operation.
  • the bar 16 with its needles and cutter bar must extend, of course, for the full width of the web being threaded through the dryer.

Landscapes

  • Replacement Of Web Rolls (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Basic Packing Technique (AREA)
US06/131,403 1979-05-19 1980-03-18 Apparatus for threading a float web dryer Expired - Lifetime US4309830A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792920329 DE2920329C3 (de) 1979-05-19 1979-05-19 Vorrichtung zum einziehen einer warenbahn in einen schwebetrockner
DE2920329 1979-05-19

Publications (1)

Publication Number Publication Date
US4309830A true US4309830A (en) 1982-01-12

Family

ID=6071180

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/131,403 Expired - Lifetime US4309830A (en) 1979-05-19 1980-03-18 Apparatus for threading a float web dryer

Country Status (7)

Country Link
US (1) US4309830A (sv)
DE (1) DE2920329C3 (sv)
FI (1) FI64204C (sv)
FR (1) FR2457457A1 (sv)
GB (1) GB2049631B (sv)
NL (1) NL8002826A (sv)
SE (1) SE442858B (sv)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5152471A (en) * 1987-11-05 1992-10-06 Beloit Corporation Web threading apparatus for web slitting machines
US5249373A (en) * 1991-01-29 1993-10-05 W. R. Grace & Co.-Conn. Web threading system
US5306393A (en) * 1992-07-16 1994-04-26 Huyck Licensco, Inc. Method for installing a fabric in a paper machine
DE9415859U1 (de) * 1994-09-30 1994-11-24 Vits Maschinenbau GmbH, 40764 Langenfeld Vorrichtung zum Einziehen einer Warenbahn in mindestens eine Behandlungsstation
US5921453A (en) * 1997-08-15 1999-07-13 Kabushiki Kaisha Tokyo Kikai Seisakusho Paper feeding apparatus in web threading apparatus
US6131784A (en) * 1997-12-22 2000-10-17 Valmet-Karlstad Ab Threading device
US6343424B1 (en) * 1999-10-21 2002-02-05 Vits Maschinenbau Gmbh Apparatus for drying and cooling with subsequent coiling or sheet cutting of a paper web
US6513428B1 (en) * 2001-07-23 2003-02-04 Heidelberger Druckmaschinen Ag Device and method for attaching a printing web to a webbing sail and device and method for webbing-up a printing machine
US20190039846A1 (en) * 2017-08-04 2019-02-07 Jtekt Corporation Web conveying device
CN113237307A (zh) * 2021-05-24 2021-08-10 赣州广建玻纤有限公司 一种捻纱生产用高效烘干装置
CN116079807A (zh) * 2023-04-12 2023-05-09 山东强华防水科技有限公司 一种防水卷材铺设用裁切装置
IT202200014710A1 (it) * 2022-07-13 2024-01-13 Ims Tech S P A Macchina per il converting con infilamento automatico del nastro di materiale
US12497258B2 (en) * 2022-07-13 2025-12-16 Ims Technologies S.P.A. Converting machine with material strip storage buffer

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2287242A (en) * 1994-03-11 1995-09-13 Bretting C G Mfg Co Inc Threading webs through web-transport machines.
DE9409390U1 (de) * 1994-06-10 1994-09-08 Sächsisches Institut für die Druckindustrie GmbH, 04439 Engelsdorf Bahneinzugsvorrichtung
DE19950710B4 (de) * 1999-10-21 2005-08-18 Vits Verwaltungs Gmbh Anlage zum Trocknen und Kühlen und zum anschließenden Aufwickeln oder Querschneiden einer Papierbahn
DE102005022467A1 (de) * 2005-05-14 2006-11-16 Voith Patent Gmbh Rollenwickeleinrichtung
CN113060580A (zh) * 2021-04-25 2021-07-02 湖北联玉新材料科技有限公司 一种保鲜膜烘干剪切设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3362087A (en) * 1966-12-20 1968-01-09 Singer Co Dryers for carpets and the like
US3508342A (en) * 1968-04-04 1970-04-28 Midland Ross Corp Threading apparatus for web dryers
US3643343A (en) * 1968-12-24 1972-02-22 Midland Ross Corp Threading a paper web in a web dryer
US3892012A (en) * 1973-04-06 1975-07-01 Reifenhaeuser Kg Method of and apparatus for forming rolls of continuously supplied sheet material
US4079877A (en) * 1977-01-07 1978-03-21 Midland-Ross Corporation Web-dryer threading apparatus having anti-centrifugal structure
US4171780A (en) * 1977-06-02 1979-10-23 Aldo Bugnone Final stage of a web treatment machine such as a printing machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178124A (en) * 1963-03-22 1965-04-13 Eastman Kodak Co Automatic web threading arrangement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3362087A (en) * 1966-12-20 1968-01-09 Singer Co Dryers for carpets and the like
US3508342A (en) * 1968-04-04 1970-04-28 Midland Ross Corp Threading apparatus for web dryers
US3643343A (en) * 1968-12-24 1972-02-22 Midland Ross Corp Threading a paper web in a web dryer
US3892012A (en) * 1973-04-06 1975-07-01 Reifenhaeuser Kg Method of and apparatus for forming rolls of continuously supplied sheet material
US4079877A (en) * 1977-01-07 1978-03-21 Midland-Ross Corporation Web-dryer threading apparatus having anti-centrifugal structure
US4171780A (en) * 1977-06-02 1979-10-23 Aldo Bugnone Final stage of a web treatment machine such as a printing machine

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5152471A (en) * 1987-11-05 1992-10-06 Beloit Corporation Web threading apparatus for web slitting machines
US5249373A (en) * 1991-01-29 1993-10-05 W. R. Grace & Co.-Conn. Web threading system
US5306393A (en) * 1992-07-16 1994-04-26 Huyck Licensco, Inc. Method for installing a fabric in a paper machine
US5429719A (en) * 1992-07-16 1995-07-04 Huyck Licensco, Inc. Self-aligning dryer fabric loading harness
DE9415859U1 (de) * 1994-09-30 1994-11-24 Vits Maschinenbau GmbH, 40764 Langenfeld Vorrichtung zum Einziehen einer Warenbahn in mindestens eine Behandlungsstation
US5921453A (en) * 1997-08-15 1999-07-13 Kabushiki Kaisha Tokyo Kikai Seisakusho Paper feeding apparatus in web threading apparatus
US6131784A (en) * 1997-12-22 2000-10-17 Valmet-Karlstad Ab Threading device
US6343424B1 (en) * 1999-10-21 2002-02-05 Vits Maschinenbau Gmbh Apparatus for drying and cooling with subsequent coiling or sheet cutting of a paper web
EP1101720A3 (de) * 1999-10-21 2003-01-02 VITS-Maschinenbau GmbH Anlage zum Trocknen und Kühlen und zum anschliessenden Aufwickeln oder Querschneiden einer Papierbahn
US6513428B1 (en) * 2001-07-23 2003-02-04 Heidelberger Druckmaschinen Ag Device and method for attaching a printing web to a webbing sail and device and method for webbing-up a printing machine
US20190039846A1 (en) * 2017-08-04 2019-02-07 Jtekt Corporation Web conveying device
JP2019026466A (ja) * 2017-08-04 2019-02-21 株式会社ジェイテクト ウエブ搬送装置
CN109384073A (zh) * 2017-08-04 2019-02-26 株式会社捷太格特 箔材输送装置
US10836598B2 (en) * 2017-08-04 2020-11-17 Jtekt Corporation Web conveying device
CN113237307A (zh) * 2021-05-24 2021-08-10 赣州广建玻纤有限公司 一种捻纱生产用高效烘干装置
IT202200014710A1 (it) * 2022-07-13 2024-01-13 Ims Tech S P A Macchina per il converting con infilamento automatico del nastro di materiale
EP4306464A1 (en) * 2022-07-13 2024-01-17 IMS Technologies S.p.A. A converting machine with automatic insertion of the material strip
US20240017951A1 (en) * 2022-07-13 2024-01-18 Ims Technologies S.P.A. Converting machine with automatic insertion of the material strip
US12497258B2 (en) * 2022-07-13 2025-12-16 Ims Technologies S.P.A. Converting machine with material strip storage buffer
US12503328B2 (en) * 2022-07-13 2025-12-23 Ims Technologies S.P.A. Converting machine with automatic insertion of the material strip
CN116079807A (zh) * 2023-04-12 2023-05-09 山东强华防水科技有限公司 一种防水卷材铺设用裁切装置

Also Published As

Publication number Publication date
NL8002826A (nl) 1980-11-21
DE2920329C3 (de) 1988-06-16
FR2457457A1 (fr) 1980-12-19
DE2920329C2 (de) 1984-05-17
FI64204B (fi) 1983-06-30
FI801606A7 (fi) 1980-11-20
FR2457457B1 (sv) 1984-03-09
FI64204C (fi) 1983-10-10
GB2049631A (en) 1980-12-31
DE2920329A1 (de) 1980-11-20
SE442858B (sv) 1986-02-03
GB2049631B (en) 1983-04-27
SE8003560L (sv) 1980-11-20

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